College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, PR China.
Talanta. 2013 Aug 15;112:111-6. doi: 10.1016/j.talanta.2013.03.010. Epub 2013 Mar 13.
PtAu bimetallic nanoparticles (NPs) were successfully synthesized on graphene sheets-multi walled carbon nanotubes (G-CNTs) hybrid nanomaterials via a simple one-step chemical co-reduction method in ethylene glycol (EG)-water system. The nanocomposites (PtAu/G-CNTs) were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM) and X-ray photoelectron spectroscopy (XPS). Then a sensitive nonenzymatic hydrogen peroxide (H2O2) sensor was fabricated based on PtAu/G-CNTs nanocomposites modified glassy carbon electrode (GCE). The results of electrochemical experiments demonstrated that the sensor exhibited excellent electrocatalytic activity to the reduction of H2O2. The sensor displayed a fast amperometric response time of less than 4s with linear detection range from 2.0 to 8561 μM and a relatively low detection limit of 0.6 μM (S/N=3). In addition, the sensor also showed good selectivity for H2O2 detection, long-term stability and reproducibility.
PtAu 双金属纳米粒子（NPs）通过在乙二醇（EG）-水体系中的简单一步化学共还原法成功地合成在石墨烯片-多壁碳纳米管（G-CNTs）杂化纳米材料上。纳米复合材料（PtAu/G-CNTs）通过 X 射线衍射（XRD）、透射电子显微镜（TEM）和 X 射线光电子能谱（XPS）进行了表征。然后，基于 PtAu/G-CNTs 纳米复合材料修饰的玻碳电极（GCE）制备了一种灵敏的非酶过氧化氢（H2O2）传感器。电化学实验结果表明，该传感器对 H2O2 的还原表现出优异的电催化活性。传感器具有快速的安培响应时间，小于 4s，线性检测范围为 2.0 至 8561 μM，检测限相对较低，为 0.6 μM（S/N=3）。此外，该传感器还对 H2O2 检测具有良好的选择性、长期稳定性和重现性。
